The roch



(N0.Mode1.)

E. R. BRYANT. ATTACHMENT FOR METAL PLANBRS. No. 296,270. Patented Apr.l, 1884* Fay. Q.

J ,2 Va

'IhzrenZor;

UNiTEn STATES PATENT @rrrca nnwnv n. BRYANT, F ROCHESTER,

NEV YORK, ASSIG-NOR TO- THE ROCH- ATTACH MENT FOR M ETAL-PLANERS.

SPECIFICATION forming part of Letters Patent No. 296,270, dated April 1,1884.

Application filed August 27, 1883. (N model.)

To all whom it may concern;

Be it known that I, EDWIN R. BRYANT, of Rochester, in the county ofMonroe and State of New York, have invented a new and useful Improvementin Attachments for Il'Oll-Plttllers, which improvement is fully setforth in the following specification and accompanying drawings.

Much practical difficulty is experienced by machinists in planing theunder surfaces of work with the iron-planers as ordinarily constructed,crooked and awkward-shaped tools having to be provided for the purpose,which, on account of their shape and length, spring I 5 away from thework when the out being taken is at all heavy, and the use of whichtools is attended with other disadvantages and inconveniences.

To produce a simple attachment for such a 2:) planer, designed to hold asimple cutting-tool rigidly in position to plane under-surfaces andprovide the same with certain features of adjustment and other desirablecapabilities, is

the object of my present invention.

Referring to the drawings, Figure 1 is a front elevation of my improvedattachment, shown as secured to the apron of the planer by means of thetool-clamping bolts of the same, showing the tool in position tooperate;

Fig. 2, a top view of the same, looking in the direction indicated byarrow 2 in Fig. 1, some of the parts being shown in different position;

' and Fig. 3, a side elevation of the same, viewed as indicated by arrow3 in Fig/1.

Referring to the parts, A is the swinging slide, and B the apron, of aniron-planer, as commonly constructed, and G the taper bolt, holding theapron in place against the slide A. The swinging slide is constructed toswing in a vertical plane upon the cross-slide (not shown) in the usualmanner.

F are the usual tool-clamping bolts, extending horizontally out from theface of the apron.

G is a block of iron, forming the body of my 5 improved attachment,which I attach directly or indirectly to the swinging slide A, so thatit ahall partake of the various motions of said sli' e.

separate piece from the apron and secured This block or body may be madea thereto by means of the clamping-bolts for holding the tool, or it maybe made in one piece with the apron and secured to the ver tical slideA, by means of the taper bolt 0, between the projecting sides D, aseparate apron of usual construction for holding the cuttingtools beingalso provided for the planer. I prefer, however, the form as shown, inwhich the body is provided with holes adapted to slip over theclamping-bolts F of the apron, the ordinary clamp for the tools havingbeen first removed, the back surface of the body, when in place, restingagainst the face a of the apron. The clamping-nuts I bear against seatse, formed on the face of the body G, which holds the body rigidly to theapron and indirectly to the swinging slide. The body G is provided witha longitudinal opening, into which is fitted a tool stock or shaft, K,provided atits lower end with an opening in which to receive a cuttingtool, b, all being clearly shown in Fig. 1. The upper part of the bodyis cut away, forming a cavity, 9, in which is fitted a circular plate,H. The toolstock pierces the plate H at its center, as shown in Fig. 2,and these two parts are connected, so as to turn together, by means of akey or feather, a, secured to the plate in a slot, f, in position toslide in a longitudinal race, (I, of the tool-stock. A set-screw, a,passing horizontally through the plate and pressing against the key a,holds the plate and tool-stock rigidly together; but when thus held theymay turn a, short distance on their bearings within and upon the body G,as will be fully explained further on. By loosening the set-screw a thetool-stock may be longitudinally adjusted within the body and plate H,for the purpose of bringing the tool to the work. The plate has anextended part, k, the ends or faces a a of which are arranged to meetthe respective faces, 12 p, of projecting parts of the body G when thetoolstock is turned within thebody, sufficient space beingleft betweenthe opposing faces to admit the tool sto'ck to thus turn a shortdistance. A sectoral block, 71, is fitted to fill the space between theopposing faces at either end of the extended part is, being held ineither position of adjustment by means of a pin, i, extending out bothways from the opposing faces of the block and made to enter a hole, 0,in the body. The block is of such a size as to hold the toolstock, whenthe end of the part 70 is brought against it, in either position ofadjustment, in such position that the tool I) will stand parallel withthe face of the apron, as shown in Fig. 2. In each case the block h isinserted in place nearer the point of the tool and forms a stop for thetool-stock, to prevent the tool being swung too far around by the workpressing against its point. The space at the other end of the part Itallows the tool-stock to turn in the opposite direction for the purposeof carrying the tool away from the work when the latter starts back fromthe reverse motion of the planer. The tool is secured in place in thestock by means of a simple set-screw, 1', as;

shown.

L represents the work, which, when moving in the direction indicated bythe arrow in Fig.

v 2, is being acted upon by the tool, the block h serving to hold thetool in position, as stated. IVhen the motion of the work. is reversed,the tool will be carried slightly toward the dotted position (referredto by Z) by the friction against its point, which tends to relieve thefriction and allow the point of the tool to move easily along the work.This slight forward motion of relief for the point of the tool isrendered possible on account of the space between the faces at and 12,above described. After the work, in its reverse motion, has passed thepoint of the tool, the latter is brought back in position for anotherout by means of a spring, 25, said spring, as shown, being an ordinaryspiral spring secured at its respective ends to pins 8 s, projecting,respectively, from the under surface of the plate H and face of the bodyG. This light spring causes the tool to drag during the reverse motionof the planer, but only to the extent of the energy of the spring. Toplane on the opposite side, a tool has to be put in the stock in anopposite direction, as shown in dotted lines, the block 71, transferredto the space at the other end of the part k, and the end of the springthat is attached to the pin 8 changed to the pin a on the other side ofthe block or body.

In using the device, the tool stock is vertically adjusted within thebody, and the point of the tool brought up to the work by means of thescrew that moves the swinging slide A and the horizontal feed-works ofthe planer set inmotion.

Fig.3 shows the back surface of the body as being planed obliquely withthe ends and bore receiving the tool-stock, so that the latter is heldin an inclined positionthat is to say, the upper end of the tool-stockinclines slightly away from the face of the vertical slide A. From thisposition of the parts it will be understoodthat when the said tool-stockis turned in its bearing within the body, as above stated, the point ofthe tool will not move in a horizontal plane, but will deviate therefromor move in an oblique plane and in such a manner that the said pointwill take a lower position as it moves away from its position whencutting on either side of the bodythat is to say, the point of the toolwill be lower when in the position shown at Zthan it will be when in theposition shown at b. This dropping of the point of the tool assists infreeing it from the work, so that it will not drag when the work isrunning back.

In attaching my invention to the swinging slide of a planer, I do notconfine myselfto the use of the apron and clamping-bolts for the tool.This attachment may be formed to fit and be secured directly to theswinging slide, to partake of its vertical and oblique motions.

vIt is well understood that the apron is hung at the top, so that itwill swing out at the bottom for the purpose of relieving the point ofthe tool when the work is running back, in doing upper-surface planing.This motion of the apron, if the latter be used, needs to be preventedwhile doing under-surface work, for if it occurred it would cause thetool to catch onto the work and break when the latter started back. Itwill be easily understood that removing the apron entirely and clampingthe attachment directly and rigidly to the swinging slide would be aproper and legitimate mode of attaching the same. If attached to theapron of the swinging slide, the former would have, by some simplemeans, to be secured rigidly to the latter, so that it could not risetherefrom.

" I claim as my invention- 1. An attachment for an iron-planer,consisting, in combination with the swinging slide A, of a block, G,rigidly secured to the swinging slide, provided with a stock, K, forholding the cutter, said stock being fitted in a circular bearing withinthe block, for the purpose of permitting it to'turn within the latter tobring the point of the tool in position to take a cut, or be turned torelieve the point of the tool from the work during the reverse motion ofthe planer, substantially as described.

2. An attachment for an iron-planer, consisting, in combination with theswinging slide, of a block, G, rigidly secured to the swinging slide,provided with a stock, K, for holding the cutter, fitted to a circularbearing within the block, for the purpose of permit ting it to be turnedwithin the latter at each forward and backward motion of the planer, tobring the point of the tool, respectively, in position to take a cut orrelieve it from the work, said stock K being longitudinally adjustablewithin the block, substantially as described. v

3. The attachment for iron-planers, consisting of a block, G, rigidlysecured to the swinging slide A, stock K, for holding the cutter b,fitted to a circular bearing within the block G, for the purpose setforth, collar H, secured to the stock K, and stop It, to limit thedistance the stock may be turned within the block, substantially as setforth.

tached thereto, provided with a tool-stock, K, for holding thecutting-tool, said tool-stock being fitted to a circular hearing withinthe block, for the purpose of permitting it to be turned therein tobring the point of the cutting-tool either to or away from the work,said tool-stock being held by the block in an inclined position, for thepurpose of allowing the point of the tool to deviate from a horizontalplane when the stock K is turned in its bearings, as stated, for thepurpose set forth.

7 E. R. BRYANT.

. Witnesses:

' E. B. XVHITMORE, M. D. PHILLIPS.

